Gang-saw attachment.



.NQ; 784,787. Patented July I5, I932.

- J. E. DUDHANDIS.

GANG SAW ATTACHMENT.

(Application filed Oct. 26, 1900.

(No Model.)

jfz'inessas 6 was UNITED STATES PAT NT OFFICE.

JOSEPH -E. DUCHANOIS, OF COTTONW'OO D. FALLS, KANSAS.

GANG-SAW ATTACHMENT;

SPECIFICATION forming part of Letters Patent No. 704,787, dated July 15,1902.

Application filed October 26,1900. Serial No 34,458. (No model.) v e Toall 1072,0171, it ntcty concern.-

Be it known that I, J osnPn E. DUGHANOIS, a citizen of the UnitedStates, residing at Cottonwood Falls, in the county of Chase and Stateof Kansas, haveinvented newand useful Improvements in Gang-SawAttachments, of which the following is a specification.

My invention relates to gang-saw hangers wherein a secondary medium isused for holding the saws rigidly in their positions. There have beennumerous such attachments devised. Four general objects are to beattained in such devices: first, adjustment to the length of the stoneto be sawed; second, adjustment to the width of theistone to be sawed;third, security and simplicity in adjustment or operation, and, fourth,economy in construction. In all of the attachments heretofore devisedone or more of these essentials have been disregarded; My device regardsthem all. The sand or grit and the water necessarily used in sawingstone will get into the parts of the machine, and thus render adjustmenta very disagreeable, if not difficult, operatioh if the machine is adjustv able at all. a

The object of my invention is therefore to combine in a gang-saw anattachment which shall be adjustable to bothvthe length and width of thestone to be sawed, which shall be secure and simple in adjustment andoperation, and which shall be economical in construction.

In the illustrations, Figure l is an end e1evation with the side bars ofthe gang-frame in section. Fig. 2 is a partial plan view giving parts ofthe gang-saw frame and showing the method of adjusting the bar D inits'relation to the saws. Fig. 3 is a side View of the dog or clamp A,showing its position on'one of the saws.

Similarletters refer to similar parts throughout the drawings.

The gang-saw frame is constructed of gaspipe. The top of the side bars 0has a series of threaded holes G" O to receive the capscrews D, Thecross-bar D is round and has holes in its "flattened ends of sufficientsize to receive the body of said cap-screws, which hold said bar Dfirmly to said side bars 0. The dogs or clamps A have round holescorresponding to said round bar D and may be strung on the bar Dpreviousto its ends being flattened, or the bottoms of said round holes may beslotted out to receive said flattened ends. In the upper side of saiddogs A (upper when they are in position clamped to the saws, as shown inthe several views) are the set-screws F, which serve to hold the saiddogs firmly in place on the barD and which are in turnheld in placebythe jamnut E. The dogs or clamps'A are of one piece, ofeithercast-iron or cast-steel, and are slotted, as shown at-B, toreceive the saws G. By the use of the-round bar D and the setscrew Fbeing on the upper side of said dogs A it becomes an easy operation toremove said dogs from the saws G without raising the bar'D from thegang-saw frame, forthe dog may be simply turned or revolved on the roundbar D until its length is in a horizontal plane and free from contactwith the saw G, having first unscrewed the set-screw F. The advantage inhaving the set-screw on the upper side is that a wrench may be used uponit and turned entirely around. If it were on the side,as in somedevioes,'the other saws and attachments will interfere with the movementof the wrench. The gang-saws G are attached to the end frame OVin theusual manner by means of the pin G, the strap G, and the wedge G", thesaid strap G passing, as shown, through the slot G of the said frame 0.o

In application the bar D, rigidly attached to the frame 0 of thesaw-hanger at the points D D' by the sorews'D D, is placed in suchposition in relation to the gang-saws as may be necessary to the desiredresult, which is the'holding of the saws rigidly in their severalpositions. For instance, a gang-saw set to saw a stone eight feet inlength with a twofoot action of the gang in sawing could be practicallyrehung so as to saw a stone four feet in length with the same action insawing by moving the bar D to a position bearing the same relation tothe new length, or,' in other words, by aid of the bar D, cap-screws D,and holes 0', so far as practical results are concerned, the saw-hangerO maybe-shoriened or lengthened, as may be desired.

In operation the number of the clamps A equal to the number of saws Gplaced in the gang-saw hanger C are strung upon the rodD.

ICU

As the saws are bound to either end of the gang-frame O, the clamps A,through the bar D, are set immediately over said stringing, beingrigidly attached to the frame 0 by the devices shown at D D D D", sothat said clamps A may be forced down over the saws and fixedly held intheir place by the setscrew F of the said clamp, said set-screw beingrigidly set, the jam-nut E also being set, holding the set-screw Ffirmly in place, keeping it from jarring loose.

Another object in these adjuncts and binders is that a series of saws inthe gang-saw hanger may be set to the required Widths to be sawed, asimple measurement between the faces of the clamps A being all that isnecessary to practically gage the widths to be sawed. With these devicesmeasurements may be taken and the saws rigidly held in position insawing by the clamping devices A, which are held in position at therequired widths by the set-screws F and jam-nut E on the bar D.

hat I claim as new, and desire to secure by Letters Patent, isr In anattachment for a gang-saw frame the combination with the frame, a seriesof threaded holes in the upper sides of the side bars as shown, thecap-screws D, D; the round cross-bar D adj ustably attached to saidframe 0 by said cap-screws D", D, and said threaded holes 0, C; a seriesof dogs or clamps A, A, each being of a single piece of cast iron orsteel, and having round holes to fit onto said round bar D, and slots'toreceive the saws, and having in their upper ends the setscrews F, F,which are held in place by the jam-nuts E; and a series of saws G, G;substantially as described.

In testimony whereof I have affixed my signature in presence of twoWitnesses.

JOSEPH E. DUCHANOIS.

